Resealable fastening device

ABSTRACT

A resealable fastening device which is suitable for use in gripping and holding a stud. The device comprises an integrally cooperating collar with an elongated tubular housing which forces movable balls under the influence of a compression spring against a tapered surface to grip a stud. A camming device is required to install and disengage the resealable fastener.

FIELD OF THE INVENTION

The invention relates to a high gripping force fastener and moreparticularly to a stud, but not limited to, retaining a removablepassenger seat.

BACKGROUND OF THE INVENTION

Mini-Van vehicles have one or more removable passenger seats. Knownfastening devices include a flange with a horizontal bar that is mountedin the floor of the vehicle and one or more lever actuating latches thatare attached to either the front or back corners of the passenger seatbase. From time to time, the passenger seat or seats are removed fromthe vehicle to increase the cargo carrying capacity.

The operation of the prior art device requires the simultaneous pullingup and retention of the corner mounted latches while at the same timelifting the seat clear of the floor mounted bar flange. Failure to liftthe seat clear from the floor mounted bar flange can result in theinadvertent relatching of the seat to the bar flange if control of theseat is lost during the removal process. Releasing and removal of theseat requires considerable strength and dexterity to execute. Becausethe prior art latches comprise a plurality of upside-down U-shaped latchclaws that partially encircle the bar of the floor mounted bar flange,it is difficult to physically remove the seat from the vehicle. Thecarpet on the floor of the vehicle can be snagged and/or torn during theseat removal activity. One or more of the U-shaped latch claws can bedamaged or bent during the removal process from the vehicle or duringthe time the seat is in storage outside of the vehicle. A damaged orbent latch claw could prevent or make difficult the reinstallation ofthe seat in the vehicle. The handling of the seat, with its exposedlatch claws, poses a potential injury hazard. When the seat is removed,the open floor mounted bar flange can provide a tripping risk.

SUMMARY OF THE INVENTION

According to the present invention, the above and other disadvantagesare overcomed with this resealable fastening device. The stud of thepresent invention comprises an elongated bar with an islet that hingesthe stud to the floor mounting flange of the vehicle. The stud, when notin use, folds down to provide a cover for the floor mounting flange. Thestud, in the preferred embodiment, is reverse tapered, and not limited,from its terminus downward to two thirds of its usable length. Thereverse taper urges the collar to tighten its holding action under theinfluence of shock and vibration. In an alternate embodiment, the studis cylindrical. The fastener comprises a collar assembly including acylindrical shell with an axial passage for the stud, a relativeshoulder, a plurality of radial openings in the shell, and acircumferencial groove for maintaining a retention ring. A radiallymovable ball is located in each of the openings in the shell. The collarfurther includes a spring housing that is coaxial with and confined tothe cylindrical shell element. A load transmitting body includes acylindrical shell with an axial passage for the collar body, an internalflange, and a tapered inner surface adjacent to the movable balls. Thetapered surface provides a relatively small diametrical adjustment tothe movable balls in the first position and large adjustment in thesecond position. A tubular surface in cooperation with a stop elementrestricts the position of the load transmitting body relative to thecollar body/spring housing assembly. Coaxially retained between thecollar body/spring housing assembly and the load transmitting body is acompression spring. When the fastener is not attached to the stud, thecompression spring applies sufficient compression force between thecollar body/spring housing assembly and the load transmitting body tomaintain relative alignment of the interfacing elements. When thefastener is attached to the stud, the compression spring applies acompressive force that is proportionate to its displacement and istransmitted axially by the radial openings of the collar body againstthe movable balls. The movable balls in cooperation with the taperedsurface of the load transmitting body grips the stud. In the preferredembodiment that uses a reversed tapered stud with the collar assembly,the gripping force increases to resist disengagement. Deformation of thestud occurs under the influence of the hardened tapered surface and themovable balls. The deformed surface of the tapered stud, caused by theinterface with the movable balls, is localized and thus will notinterfere with the normal removal and reattachment of the collarassembly to the stud.

A mechanical camming device is needed to compress the collar assemblyprior to insertion of the stud or removal of the stud. The compressedcollar assembly is positioned above and lowered onto the raised stud.When the stud is installed to its full exposed length, the mechanicalcamming device is released to affix the collar assembly to the stud byallowing the compression spring to exert a coaxial force with the collarbody that impinges the movable balls between the tapered surface of theload transmitting body and the stud.

These and other arrangements of the gripping and releasing function areused selectively in the various embodiments to effect the variety ofinventive arrangements and applications as will become apparent uponview of the detailed specifications hereof.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an assembled, cross-sectional view of the Resealable FastenerDevice of the present invention, showing a preferred embodiment thereof.

FIG. 2 is an assembled, side view of the resealable fastener device asshown in FIG. 1.

FIG. 3 is a cross-sectional view of the resealable fastener device inthe second position.

FIG. 4 is a cross-sectional view of the resealable fastener device inthe first position.

FIG. 5 is a side view of the resealable fastener device in the firstposition.

FIG. 6 is a cross-sectional view of the floor mount apparatus with thetruncated stud elevated as shown in FIG. 1.

FIG. 7 is a cross-sectional view of the floor mount apparatus with atruncated stud lowered.

FIG. 8 is a cross-sectional view of the floor mount apparatus with astraight stud lowered.

FIG. 9 is a pictorial view of the resealable collar and applicationtool.

FIG. 10 is a cross-sectional view of an alternate embodiment of theresealable fastener engaging a flanged hasp.

FIG. 11 is a pictorial view of an alternate embodiment of the resealablefastener engaging a rotary hasp and chain.

FIG. 12 is a side view of the stud shown in FIG. 10.

FIG. 13 is an isometric view of the hooked stud shown in FIG. 11.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now in greater detail to the drawings in which like numeralsrepresents like components throughout the several views, FIG. 1 depictsa preferred embodiment of the resealable fastener device 10 of thepresent invention. The resealable fastener device 10 is seen comprisingfour main portions, the floor mount portion 11, the shell portion 12,the cam actuator portion 13, and a tubular housing 14. The floor mount11 of the embodiment in FIG. 1 is seen in greater detail in FIGS. 2, 6,7, & 8, is shown comprising a lynch pin 91 that is affixed to a studmount fixture 94, with a truncated section 93 that pivots about a formedislet 92 that is housed in the horizontal stop 97 recess with one ormore floor mount passages 95. The shell portion 12 of the embodiment inFIG. 1 is seen in greater detail in FIGS. 3 & 4, is shown comprising oftubular passage 22 with one or more radial openings 21 and a movableball 31 occupying each of these openings. The axial displacement of themovable ball 31 is controlled by their relative position with respect tothe pressure ring 51. The pressure ring 51 includes a cylindrical innersurface 52, a tapered surface 53, a pressure application surface 54, anda cylindrical outer surface 55. The clearance between the cylindricalsurface 52 of the pressure ring 51 and the shell 12 allows for linearalignment of the interfacing components. The clearance between thecylindrical outer surface 55 and the seat support tubular housing 14allows lineal movement between the interfacing components whilemaintaining relative alignment. The actuator portion 13 of theembodiment in FIG. 1 is seen in greater detail in FIGS. 2, 3, 4, & 5, iscomprised a release cam 61 with a lever arm 63 that pivots about the camaxis 62 that passes through the pivot hole 71 to interact with camfollower pin 81 to influence the position of the pressure ring 51.

In the preferred embodiments of the present invention, such asrepresented in FIGS. 1-5, the seat support tubular housing 14 provides arigid structure for affixing the shell 12 between the shell interface 23and the inner support housing 74. The affixed shell 12 provides afixture for guiding the pressure ring 51 under the influence of pressurebeing applied by the release cam 61 against the cam follower 81. Theorientation of the pressure ring 51 is maintained by the cam shank 83that is guided by the cam ring guide slot 73 which is vertically locatedin the wall of the seat support tubular housing 14. Opposing thecompressive force of the release cam 61 is the pressure spring 41 whichis positioned in the spring retention shoulder 24 of the shell 12 toexert pressure against the pressure application surface 54. The cam ringguide/stop 72 in cooperation with cam shank 83 of the cam follower pin81 limits the vertical travel of the pressure ring 51 under theinfluence of the pressure spring 41.

The embodiment shown in FIGS. 4 & 5 depicts the invention in the firstposition. The lever arm 63, which rotates through the pivot hole 71 andabout cam axis 62, the minimum travel cam surface 64 is in directcontact with the cam stop surface 82 of the cam follower 81. In thisfirst position, the cam ring guide/stop 72, in cooperation with theminimum travel cam surface 64, limits the vertical travel of camfollower pin 81. Lifting the lever grip 68 of the lever arm 63 to theraised position shown in FIGS. 1, 2, & 3, the lever grip 68 ismaintained in a position relative to the cam follower pin 81 by restingin the recessed interface between the cam dwell point 67 and the camstop surface 82. In raising the lever grip 68, the lever arm 63 isrotate through 90° about the cam axis 62 through the pivot hole 71 fromthe minimum travel cam position 64 through the position transition camsurface 65 to the maximum travel cam surface 66 before settling in thecam dwell point 67. The radial displacement of the cam dwell point 67 isless than the radial displacement of the maximum travel cam surface 66to form a resting point for the cam stop surface 82 of the cam followerpin 81 to stop. Under the influence of the pressure being applied by theraised lever arm 63, the pressure ring 51 is depressed to its lowestposition by pressure being applied through contact with the cam followerpin 81. In the second position, the radial pressure applied by thecylindrical surface 52 against the movable balls 31 is relieved. Themovable balls 31 are free to retract while in contact with the taperedsurface 53. The tubular passage 22 is relieved of any obstruction thatcan be created by the impingement of the movable balls 31 protrudingthrough the radial opening 21 in the shell 12. With the movable balls 31in the retracted position, the elevated truncated section 93 or thestraight section 93' can be inserted into the tubular passage 22 withoutdifficulty.

The embodiments shown in FIG. 1 depicts the invention with the truncatedsection 93 of the floor mount 11 in the elevated position and insertedinto the tubular passage 22 of the shell 12. When the bottom surface 26,as shown in FIGS. 1 & 2, is lowered to a position that contacts thesupport surface 100, the lever arm 63 can be rotated downward to theposition shown in FIGS. 4 & 5 to permit the movable balls 31 to impingethe truncated post 93 under the influence of the pressure spring 41applying a vertical compressive force against the pressure applicationsurface 54 which applies a cooperative radial force under the influenceof the tapered surface 53 and the movable balls 31 whose verticalposition is being restricted by the radial opening 21. The radialopening 21 exerts an opposing force to that applied by the pressurespring 41. In the preferred embodiment, a hardened movable ball 31 iscammed radially under the influence of a hardened tapered surface 53 toimpinge upon a less hard truncated section 93 or straight section 93'.The clearance between the full diameter shank 105 penetrating thetubular passage 22 is limited to provide linear alignment of theinterfacing components and increase the horizontal resist shear betweenthe mating surfaces.

The embodiments shown in FIGS. 6, 7, & 8 depict the floor mount 11.Detailed in FIG. 6 is an elevated truncated section 93 which pivotsabout the lynch pin 91 which is rigidly affixed to a stud mount fixture94 and retained by the formed islet 92. In the elevated position, thevertical travel of the raised stud is limited by the stud vertical stop96 in cooperation with formed islet 92 and lynch pin 91. FIGS. 7 & 8depict the truncated section 93 or the straight section 93' lowered intothe recess formed by the horizontal stop 97 in the stud mount fixture94. The horizontal stop 97 is radiused on its upper most surface withpinch point relief 99. One or more vertical floor mount passages 95,with tapered mount recesses 98, are used to affix the floor mount 11 tothe floor of the motor vehicle.

As mentioned in the Summary, the unique combination of shell 12, camactuator 13, and truncated section 93 or straight section 93' inaccordance with the present invention provides the capability of avariety of gripping and releasing arrangements which can be utilized orin sequence to effect numerous practical mechanisms. FIG. 9, depicts analternate application of the invention where are separate clamp assemblytool 130 which is a modification of a Model XX tool manufactured andsold by the Roper Whitney Company is used to operate the collar assembly122. In this alternate embodiment, clamp assembly tool 130 depicts thelever arm 63' in the idle first position. The collar assembly 122 iscompressed by grasping and holding the lever arm 63' to the positionshown in dashed lines by lever arm 63". In the second position, thelever arm 63" pivots about cam axis 62 and provides a downward thrust oncam follower pin 81 to apply compressive force on the cam actuator 13'which is transmitted to the compressive surface 131. The collar assembly122 is compressed between the compressive surface 131 and the basesurface 132. The lever arm 63" is retained in the second position withthe clamp dwell retaining ring 67' that is part of the lever grip 68 ofthe clamp assembly tool 130. Compressing the collar assembly 122 permitsthe insertion of the straight stud 121 or the hooked stud 121'. Afterinserting the straight stud 121 or the hooked stud 121', the lever arm63" is released to affix the collar assembly 122 to the straight stud121 or the hooked stud 121'. In the released position, and the lever arm63' returns to the first position. The clamp assembly tool 130 can beremoved from the straight stud 121 or the hooked stud 121' and collarassembly 122. Referencing FIGS. 10 & 11, flange elements 111 are heldbetween the retention surface 102 of the straight stud 121 or the hookedstud 121' and the bottom surface 26 of the released collar assembly 122.More specifically, FIG. 10 details an alternate embodiment wherein thepressure spring 41 exerts a separating force between the springcentering recess 24 of the tubular housing 14' that is affixed to theshell 12 at the shell interface 23 and the pressure application surface54 of the pressure ring 51. The tapered surface 53 exerts an compressiveforce on the movable balls 31 whose position is maintained by the radialopenings 21 in the shell 12 that is affixed to the tubular housing 14'.The movable balls 31 impinges the truncated section 93 section of thestraight stud 121. The stop ring 72' interfaces the pressure ring stopsurface 82' to retain the pressure ring 51 relative to the shell 12 andtubular housing 14' assembly. The straight stud 121, as shown in FIG.12, comprises a rounded stud head 101 with a retention surface 102, ashear resistant shank 105, a truncated section 93 section, and a fulldiameter termination section 104. The collar assembly 122 can betransformed into a security device by the addition of the tag hole 103to the full diameter termination section 104 of the straight stud 121. Atamper evident tag seal, like the Spring-Lok® seal or the padlock sealproduced by E. J. Brooks Company can be treaded through the tag hole 103to complete the conversion to a security device. In another alternateembodiment, FIG. 11 demonstrates a rotary chain hasp 140 being engagedby a hooked stud 121' and collar assembly 122. In this embodiment, achain 141 is affixed to a mounting surface with a chain mount 142 andretained by the coupled hooked stud 121' with a formed hook 92' elementwhose position is maintained by the retained chain link 91' that issandwiched between the flange elements 111 that are secured between theretention surface 102 and the collar assembly 122. The ability tomaintain the position of the hooked stud 121' permits the installationand removal of the collar assembly 122 with a clamp assembly 130 withlengthened lever arms 63. The hooked stud 121', as illustrated in FIG.13, comprises a formed hook 92', a truncated section 93, a formedretention surface 102, and a cylindrical termination section 104.

Whereas the present invention has been described herein in detail withspecific reference to preferred embodiments thereof, it will beunderstood that variations and modifications can be effected within thespirit and scope of the invention as described hereinbefore and asdefined in the appended claims.

What I claim is:
 1. A latching assembly comprisinga rigid stud member(121, 121') having a free end, a retention surface (102, 102') adjacentto the other end of the stud member, a tubular support housing (14, 14')enclosing at least partially a fastening device (10) including acylindrical shell (12) having an axial passage (22) for receiving saidstud member through one end thereof, and a plurality of radial openings(21) provided in said cylindrical shell and arranged incircumferentially spaced relationship, a plurality of hardened balls(31) disposed in said radial openings of said shell and movable underthe influence of said cylindrical shell, a spring retention shoulder(24) associated with said cylindrical shell at said one end of saidcylindrical shell, a compression spring (41) positioned about saidcylindrical shell and supported on said retention shoulder (24), apressure ring (51) slidingly disposed about said cylindrical shell andhaving a pressure application surface (54) in contact with saidcompression spring, means for moving said pressure ring from a first toa second position with respect to said cylindrical shell and maintainingsaid ring in either position, said pressure ring having an interior camsurface comprising a portion adjacent said pressure surface which isparallel to said cylindrical shell and a portion which is outwardlytapered, whereby said pressure ring, when in said first position, forcessaid hardened balls to impinge on said stud member, and, when in saidsecond position, releases said balls so that the stud member may beremoved from said cylindrical shell or inserted therein.
 2. The assemblyin claim 1 wherein said stud member is of cylindrical cross section. 3.The assembly of claim 1 wherein the stud member is tapered from saidfree end in a reverse direction.
 4. The assembly of claim 1 wherein saidstud member is provided with a formed eyelet at the end opposite to saidfree end for attaching said stud member to a rigid surface, permittingthe stud member to be moved from a substantially vertical to ahorizontal position.
 5. The assembly of claim 1 wherein said means formoving said pressure ring comprises a lever mechanism operativelyassociated with said pressure ring and mounted on the outside of saidhousing.